body {
  font-family: -apple-system, Segoe UI, Helvetica Neue, Helvetica, Arial,
    PingFang SC, "Microsoft YaHei", 微软雅黑, "MicrosoftJhengHei", 华文细黑,
    STHeiti, MingLiu, sans-serif;
  word-spacing: 1px;
}
/* 背景图 */

.background-image {
  background-image: url(../img/诗夏远海游记.png);
  position: fixed;
  top: 0;
  height: 600px;
  width: 100%;
  background-repeat: no-repeat;
  background-position: center top;
  animation: change 15s linear infinite;
  transition: all 1s;
}
@keyframes change {
  0% {
    background-image: url(../img/诗夏远海游记.png);
  }
  50% {
    background-image: url(../img/千朵玫瑰带来的黎明.png);
  }
  100% {
    background-image: url(../img/诗夏远海游记.png);
  }
}

.background-image .logo-wrap {
  width: 1200px;
  margin: 0 auto;
}
.logo-wrap img {
  position: relative;
  top: 100px;
  display: block;
  width: 300px;
  height: 130px;
}
/* 顶部导航 */
.clearfix:before,
.clearfix:after {
  content: "";
  display: table;
  clear: both;
}
header {
  line-height: 60px;
  /* background-color: #2d2f33; */
  color: #fff;
  font-size: 0;
  width: 100%;
  min-width: 1200px;
  position: fixed;
  top: 0;
  z-index: 999;
}
.header-content {
  position: relative;
  width: 1200px;
  margin: 0 auto;
}
.mhy-logo {
  display: inline-block;
}
.mhy-logo > a {
  display: inline-block;
  height: 60px;
  cursor: pointer;
  vertical-align: top;
}
.mhy-logo > a > img {
  width: 90px;
  vertical-align: middle;
}
.mhy-title {
  display: inline-block;
  padding-left: 10px;
  margin-left: 10px;
  position: relative;
  vertical-align: top;
  width: 170px;
  cursor: pointer;
  font-size: 14px;
  font-weight: bold;
  color: white;
}
.mhy-title::before {
  content: "";
  height: 15px;
  border-left: 1px solid rgba(255, 255, 255, 0.3);
  position: absolute;
  top: 24px;
  left: 0px;
}
header .nav {
  display: inline-block;
  vertical-align: top;
  font-size: 14px;
  color: #fff;
  cursor: pointer;
}
header .nav li {
  float: left;
}
header .nav li:nth-of-type(2) {
  font-size: 16px;
  color: #f4d8a8;
  background: url(../img/header-nav.png) no-repeat center center;
  background-size: auto 36px;
  font-weight: bold;
}
.nav li > a {
  color: inherit;
  display: block;
}
header .nav li:nth-of-type(2) {
  margin-left: 40px;
}
/* 导航栏右侧 */
.header-right {
  float: right;
  display: flex;
  font-size: 14px;
}
.header-search {
  height: 30px;
  margin-top: 16px;
  line-height: 30px;
  background-color: rgba(255, 255, 255, 0.22);
  padding: 0 35px 0 15px;
  border-radius: 15px;
  position: relative;
  margin-right: 15px;
}

.header-search > input {
  background-color: transparent;
  color: #fff;
  width: 70px;
  height: 30px;
  outline: none;
  transition: width 300ms ease;
  font-size: 14px;
}
.header-search .icon-sousuo {
  position: absolute;
  right: 12px;
  top: 0;
  cursor: pointer;
  align-self: center;
  line-height: 30px;
}
.header-search > input:focus {
  width: 100px;
}
.header-user {
  position: relative;
  cursor: pointer;
}
.user-wrap {
  padding: 12px 20px;
}
.user-wrap:hover {
  background-color: rgba(255, 255, 255, 0.22);
}
.user-wrap img {
  display: block;
  height: 32px;
  width: 32px;
  padding: 2px;
  background-color: #fff;
  border-radius: 50%;
}
